The Trace from RED is a rugged lid that has extra ventilation which means you can take it from tsnow park to skate park summer or winter Its sleek skate look is appealing to those who just want to protect their heads on a daily basis all year round. The Trace has a Durable Injected ABS Shell Removable ear pads No Air Vent Plugs REDphones Audio Accessory compatible Unison Technology determines the whole fit of the RED Hifi helmet which in turn leads to reduced bulk & weight a superior fit & ultimately a better riding experience The Goggle Gasket is a fully removable shield that eliminates the gap between goggle & helmet while remaining windproof & breathable New & enhanced removable Goggle Clip Ultra Lightweight In Molded Polycarbonate Shell Vent Mesh Sizes Small 5557cm Medium 5759cm Large 5961cm